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CanGroup Property
See Also 
Leadtools.Windows.Annotations Namespace > AnnAutomation Class : CanGroup Property



The CanGroup Property supports WPF/Silverlight.

The CanGroup Property is available in LEADTOOLS Document and Medical Imaging toolkits.

Gets a value indicating whether this AnnAutomation is in a state where objects can be grouped together. Supported in Silverlight, Windows Phone 7

Syntax

Visual Basic (Declaration) 
Public Overridable ReadOnly Property CanGroup As Boolean
Visual Basic (Usage)Copy Code
Dim instance As AnnAutomation
Dim value As Boolean
 
value = instance.CanGroup
C# 
public virtual bool CanGroup {get;}
C++/CLI 
public:
virtual property bool CanGroup {
   bool get();
}

Property Value

true if this AnnAutomation is in a state where objects can be grouped together; false otherwise.

Example

This example will add two objects into the automation and then group them together.

Visual BasicCopy Code
Private Sub AnnAutomation_CanGroup(ByVal automation As AnnAutomation)
   ShowStatus(automation)
   ' first, add two objects to the automation
   Dim rectObj As AnnRectangleObject = New AnnRectangleObject()
   rectObj.Rect = New Rect(100, 100, 200, 200)

   rectObj.Stroke = Colors.Blue
   rectObj.StrokeThickness = 1.0
   rectObj.Fill = Nothing
   automation.Container.Children.Add(rectObj)

   ShowStatus(automation)

   Dim lineObj As AnnLineObject = New AnnLineObject()
   lineObj.Start = New Point(100, 100)
   lineObj.End = New Point(200, 200)

   lineObj.Stroke = Colors.Red
   lineObj.StrokeThickness = 1.0
   automation.Container.Children.Add(lineObj)

   ShowStatus(automation)

   ' "select" both objects
   automation.StartEditing(rectObj, False)
   ShowStatus(automation)

   automation.StartEditing(lineObj, True)
   ShowStatus(automation)

   ' make this group object a true group
   If automation.CanGroup Then
      automation.Group()
      ShowStatus(automation)
   End If

   ' ungroup to again to the origina 2 objects
   If automation.CanUngroup Then
      automation.Ungroup()
      ShowStatus(automation)
   End If
End Sub

Private Sub ShowStatus(ByVal automation As AnnAutomation)
   Dim sb As System.Text.StringBuilder = New System.Text.StringBuilder()
   sb.Append("Number of objects: ")
   sb.Append(automation.Container.Children.Count)
   sb.Append(Environment.NewLine)

   sb.Append("Object currently being edited: ")
   If Not automation.CurrentEditObject Is Nothing Then
      sb.Append(automation.CurrentEditObject.GetType().Name)
      If TypeOf automation.CurrentEditObject Is AnnGroupObject Then
         sb.Append(", Temporary: ")
         Dim group As AnnGroupObject = DirectCast(automation.CurrentEditObject, AnnGroupObject)
         sb.Append(group.IsTemporary)
      End If
   Else
      sb.Append("None")
   End If

   sb.Append(Environment.NewLine)

   sb.Append("CanGroup: ")
   sb.Append(automation.CanGroup)
   sb.Append(", CanUngroup: ")
   sb.Append(automation.CanUngroup)

   MessageBox.Show(sb.ToString())
End Sub
C#Copy Code
private void AnnAutomation_CanGroup(AnnAutomation automation)
{
   ShowStatus(automation);
   // first, add two objects to the automation
   AnnRectangleObject rectObj = new AnnRectangleObject();
   rectObj.Rect = new Rect(100, 100, 200, 200);

   rectObj.Stroke = Colors.Blue;
   rectObj.Fill = Colors.Transparent;
   rectObj.StrokeThickness = 1.0;
   automation.Container.Children.Add(rectObj);

   ShowStatus(automation);

   AnnLineObject lineObj = new AnnLineObject();
   lineObj.Start = new Point(100, 100);
   lineObj.End = new Point(200, 200);

   lineObj.Stroke = Colors.Red;
   lineObj.StrokeThickness = 1.0;
   automation.Container.Children.Add(lineObj);

   ShowStatus(automation);

   // "select" both objects
   automation.StartEditing(rectObj, false);
   ShowStatus(automation);

   automation.StartEditing(lineObj, true);
   ShowStatus(automation);

   // make this group object a true group
   if(automation.CanGroup)
   {
      automation.Group();
      ShowStatus(automation);
   }

   // ungroup to again to the origina 2 objects
   if(automation.CanUngroup)
   {
      automation.Ungroup();
      ShowStatus(automation);
   }
}

private void ShowStatus(AnnAutomation automation)
{
   System.Text.StringBuilder sb = new System.Text.StringBuilder();
   sb.Append("Number of objects: ");
   sb.Append(automation.Container.Children.Count);
   sb.Append(Environment.NewLine);

   sb.Append("Object currently being edited: ");
   if(automation.CurrentEditObject != null)
   {
      sb.Append(automation.CurrentEditObject.GetType().Name);
      if(automation.CurrentEditObject is AnnGroupObject)
      {
         sb.Append(", Temporary: ");
         AnnGroupObject group = automation.CurrentEditObject as AnnGroupObject;
         sb.Append(group.IsTemporary);
      }
   }
   else
      sb.Append("None");

   sb.Append(Environment.NewLine);

   sb.Append("CanGroup: ");
   sb.Append(automation.CanGroup);
   sb.Append(", CanUngroup: ");
   sb.Append(automation.CanUngroup);

   MessageBox.Show(sb.ToString());
}
SilverlightCSharpCopy Code
private void AnnAutomation_CanGroup(AnnAutomation automation)
{
   ShowStatus(automation);
   // first, add two objects to the automation
   AnnRectangleObject rectObj = new AnnRectangleObject();
   rectObj.Rect = new Rect(100, 100, 200, 200);

   rectObj.Stroke = Colors.Blue;
   rectObj.Fill = Colors.Transparent;
   rectObj.StrokeThickness = 1.0;
   automation.Container.Children.Add(rectObj);

   ShowStatus(automation);

   AnnLineObject lineObj = new AnnLineObject();
   lineObj.Start = new Point(100, 100);
   lineObj.End = new Point(200, 200);

   lineObj.Stroke = Colors.Red;
   lineObj.StrokeThickness = 1.0;
   automation.Container.Children.Add(lineObj);

   ShowStatus(automation);

   // "select" both objects
   automation.StartEditing(rectObj, false);
   ShowStatus(automation);

   automation.StartEditing(lineObj, true);
   ShowStatus(automation);

   // make this group object a true group
   if(automation.CanGroup)
   {
      automation.Group();
      ShowStatus(automation);
   }

   // ungroup to again to the origina 2 objects
   if(automation.CanUngroup)
   {
      automation.Ungroup();
      ShowStatus(automation);
   }
}

private void ShowStatus(AnnAutomation automation)
{
   System.Text.StringBuilder sb = new System.Text.StringBuilder();
   sb.Append("Number of objects: ");
   sb.Append(automation.Container.Children.Count);
   sb.Append(Environment.NewLine);

   sb.Append("Object currently being edited: ");
   if(automation.CurrentEditObject != null)
   {
      sb.Append(automation.CurrentEditObject.GetType().Name);
      if(automation.CurrentEditObject is AnnGroupObject)
      {
         sb.Append(", Temporary: ");
         AnnGroupObject group = automation.CurrentEditObject as AnnGroupObject;
         sb.Append(group.IsTemporary);
      }
   }
   else
      sb.Append("None");

   sb.Append(Environment.NewLine);

   sb.Append("CanGroup: ");
   sb.Append(automation.CanGroup);
   sb.Append(", CanUngroup: ");
   sb.Append(automation.CanUngroup);

   MessageBox.Show(sb.ToString());
}
SilverlightVBCopy Code
Private Sub AnnAutomation_CanGroup(ByVal automation As AnnAutomation)
   ShowStatus(automation)
   ' first, add two objects to the automation
   Dim rectObj As AnnRectangleObject = New AnnRectangleObject()
   rectObj.Rect = New Rect(100, 100, 200, 200)

   rectObj.Stroke = Colors.Blue
   rectObj.Fill = Colors.Transparent
   rectObj.StrokeThickness = 1.0
   automation.Container.Children.Add(rectObj)

   ShowStatus(automation)

   Dim lineObj As AnnLineObject = New AnnLineObject()
   lineObj.Start = New Point(100, 100)
   lineObj.End = New Point(200, 200)

   lineObj.Stroke = Colors.Red
   lineObj.StrokeThickness = 1.0
   automation.Container.Children.Add(lineObj)

   ShowStatus(automation)

   ' "select" both objects
   automation.StartEditing(rectObj, False)
   ShowStatus(automation)

   automation.StartEditing(lineObj, True)
   ShowStatus(automation)

   ' make this group object a true group
   If automation.CanGroup Then
      automation.Group()
      ShowStatus(automation)
   End If

   ' ungroup to again to the origina 2 objects
   If automation.CanUngroup Then
      automation.Ungroup()
      ShowStatus(automation)
   End If
End Sub

Private Sub ShowStatus(ByVal automation As AnnAutomation)
   Dim sb As System.Text.StringBuilder = New System.Text.StringBuilder()
   sb.Append("Number of objects: ")
   sb.Append(automation.Container.Children.Count)
   sb.Append(Environment.NewLine)

   sb.Append("Object currently being edited: ")
   If Not automation.CurrentEditObject Is Nothing Then
      sb.Append(automation.CurrentEditObject.GetType().Name)
      If TypeOf automation.CurrentEditObject Is AnnGroupObject Then
         sb.Append(", Temporary: ")
         Dim group As AnnGroupObject = TryCast(automation.CurrentEditObject, AnnGroupObject)
         sb.Append(group.IsTemporary)
      End If
   Else
      sb.Append("None")
   End If

   sb.Append(Environment.NewLine)

   sb.Append("CanGroup: ")
   sb.Append(automation.CanGroup)
   sb.Append(", CanUngroup: ")
   sb.Append(automation.CanUngroup)

   MessageBox.Show(sb.ToString())
End Sub

Remarks

(Read only) The AnnAutomation is in a state where objects can be grouped together when 2 or more objects are in an edit state.

Call the Group method to group the objects currently being edited together.

Note, when you select one or more objects in this AnnAutomation through the user interface, an AnnGroupObject will be created and the selected objects are moved from the Container to this AnnGroupObject. This AnnGroupObject is a temporary group and will be ungrouped (by calling AnnGroupObject.Ungroup) and added back to the Container when the objects are not selected anymore (for example, by clicking somewhere in the container outside the group or by calling the user interface or by calling SelectNone). To check if the current editing object is the temporary group, first check if the CurrentEditObject is an AnnGroupObject, then check if the IsTemporary value is set to true.

For more information about grouping and ungrouping, refer to Grouping and Ungrouping WPF Annotation Objects.

Requirements

Target Platforms: Silverlight 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7, MAC OS/X (Intel Only)

See Also

CanGroup requires a Document/Medical product license and unlock key. For more information, refer to: Imaging Pro/Document/Medical Features and Unlocking Special LEAD Features.